Exemplos de dataSizeStmt em C++ (Cpp)

Exemplo n.º 1

Arquivo: mobile_record_store.cpp Projeto: acmorrow/mongo

void MobileRecordStore::_initDataSizeIfNeeded_inlock(OperationContext* opCtx) const {
    if (_isDataSizeInitialized) {
        return;
    }

    MobileSession* session = MobileRecoveryUnit::get(opCtx)->getSession(opCtx);
    SqliteStatement dataSizeStmt(
        *session, "SELECT IFNULL(SUM(LENGTH(data)), 0) FROM \"", _ident, "\";");

    dataSizeStmt.step(SQLITE_ROW);
    int64_t dataSize = dataSizeStmt.getColInt(0);

    _dataSize = dataSize;
    _isDataSizeInitialized = true;
}

Exemplo n.º 2

Arquivo: mobile_record_store.cpp Projeto: acmorrow/mongo

void MobileRecordStore::deleteRecord(OperationContext* opCtx, const RecordId& recId) {
    MobileSession* session = MobileRecoveryUnit::get(opCtx)->getSession(opCtx, false);

    SqliteStatement dataSizeStmt(
        *session, "SELECT IFNULL(LENGTH(data), 0) FROM \"", _ident, "\" WHERE rec_id = ?;");
    dataSizeStmt.bindInt(0, recId.repr());
    dataSizeStmt.step(SQLITE_ROW);

    int64_t dataSizeBefore = dataSizeStmt.getColInt(0);
    _changeNumRecs(opCtx, -1);
    _changeDataSize(opCtx, -dataSizeBefore);

    SqliteStatement deleteStmt(*session, "DELETE FROM \"", _ident, "\" WHERE rec_id = ?;");
    deleteStmt.bindInt(0, recId.repr());
    deleteStmt.step(SQLITE_DONE);
}

Exemplo n.º 3

Arquivo: mobile_kv_engine.cpp Projeto: RyanBard/mongo

/**
 * Note: this counts the total number of bytes in the key and value columns, not the actual number
 * of bytes on disk used by this ident.
 */
int64_t MobileKVEngine::getIdentSize(OperationContext* opCtx, StringData ident) {
    MobileSession* session = MobileRecoveryUnit::get(opCtx)->getSession(opCtx);

    // Get key-value column names.
    std::string colNameQuery = "PRAGMA table_info(\"" + ident + "\")";
    SqliteStatement colNameStmt(*session, colNameQuery);

    colNameStmt.step(SQLITE_ROW);
    std::string keyColName(static_cast<const char*>(colNameStmt.getColText(1)));
    colNameStmt.step(SQLITE_ROW);
    std::string valueColName(static_cast<const char*>(colNameStmt.getColText(1)));
    colNameStmt.step(SQLITE_DONE);

    // Get total data size of key-value columns.
    str::stream dataSizeQuery;
    dataSizeQuery << "SELECT IFNULL(SUM(LENGTH(" << keyColName << ")), 0) + "
                  << "IFNULL(SUM(LENGTH(" << valueColName << ")), 0) FROM \"" << ident + "\";";
    SqliteStatement dataSizeStmt(*session, dataSizeQuery);

    dataSizeStmt.step(SQLITE_ROW);
    return dataSizeStmt.getColInt(0);
}

Exemplo n.º 4

Arquivo: mobile_record_store.cpp Projeto: acmorrow/mongo

Status MobileRecordStore::updateRecord(OperationContext* opCtx,
                                       const RecordId& recId,
                                       const char* data,
                                       int len) {
    MobileSession* session = MobileRecoveryUnit::get(opCtx)->getSession(opCtx, false);

    SqliteStatement dataSizeStmt(
        *session, "SELECT IFNULL(LENGTH(data), 0) FROM \"", _ident, "\" WHERE rec_id = ?;");
    dataSizeStmt.bindInt(0, recId.repr());
    dataSizeStmt.step(SQLITE_ROW);

    int64_t dataSizeBefore = dataSizeStmt.getColInt(0);
    _changeDataSize(opCtx, -dataSizeBefore + len);

    SqliteStatement updateStmt(
        *session, "UPDATE \"", _ident, "\" SET data = ? ", "WHERE rec_id = ?;");
    updateStmt.bindBlob(0, data, len);
    updateStmt.bindInt(1, recId.repr());
    updateStmt.step(SQLITE_DONE);

    return Status::OK();
}